HomeMy WebLinkAboutWPO201600015 Review Comments WPO VSMP 2016-04-15COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
VSMP Permit Plan review
Project: Old Trail Village -Slabtown Sanitary Sewer Expansion
Project File Number: WP0201600015
Plan preparer: Jeremy Fox, Ammy George, Bill Ledbetter —Roudabush, Gale & Assoc, Inc
914 Monticello Road, Charlottesville, VA 22902, 'fl ox(abroudabush.com;
ageorge@roudabush.com; bledbetter&roudabush.com
Owner or rep.: March Mountain Properties LLC [1005 Heathercroft Circle, Suite 100]
Dave Brockman, dave(a)oldtrailvilla cg com
Plan received date: 2 Mar 2016
Date of comments: 15 Apr 2016
Reviewer: John Anderson
WP0201600015
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17-405. A SWPPP must contain (1)
a PPP, (2) an ESCP, (3) a SWMP, and (4) any TMDL measures necessary.
Sheet 11
1. Show construction entrance (CE), Rowcross Street.
2. Provide solid waste dumpster.
Sheet 12
3. Revise Golf View Drive to read Golf Drive.
4. Relocate CE; ref. item #27, below.
5. Concrete Washout Note 4: Revise, incomplete sentence.
6. Concrete Washout Note 6: Since possible concrete washout locations are <400' from streams, eliminate
reference to unlined washouts. Impermeable lining for all concrete washouts is required on this project.
Sheet 13
7. Note: excellent pollution prevention practices.
8. Fueling Area Note 2: Designate Area/s on plan.
9. Solid Waste Collection Containment Area, Note 2: Designate solid waste collection area/s on plans.
10. Solid Waste Collection Containment Area, Note 5: Include "Material Management Practices —Hazardous
Products" with SWPPP. Reference SWPPP location.
11. Relocate Stockpile Area, Concrete Washout Area, and Port -potty upslope to flatter terrain farther from
Slabtown Branch (contour 682'f).
B. VSMP: SWPPP: Stormwater Management Plan (WP02016-00015)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. Provided
Applicant accepts DEQ Guidance Memo No. 15-2003 review, with conditions, no SWM Plan required. Read below.
Stormwater management plan content requirements can be found in County Code section 17-403. VDEQ Guidance
Engineering Review Comments
Page 2 of 5
Memo No. 15-2003 is Attached.
(Comments below apply under Guidance Memo No. 15-2003 review.)
12. Project is linear utility work. DEQ linear project guidance may apply. DEQ Guidance Memo No. 15-
2003, Apr 23, 2015, allows that: "DEQ staff or the local VSMP authority should utilize their best
professional judgment when evaluating aboveground or underground linear utility projects. If the project
will not result in significant changes to the predevelopment runoff characteristics of the land surface after
the completion of construction and final stabilization, then DEQ or the local VSMP authority, at their
discretion, may waive the requirement for the preparation and implementation of a stormwater management
plan." Guidance Memo No. 15-2003 is conditional, requiring the owner and/or construction activity
operator to provide "reasonable assurance to DEQ or the local VSMP Authority that all of the above
[below] conditions will be satisfied." To this end, to qualify for SWMP/VPDES (CGP) exemption under
DEQ guidance, revise plans to include following Narrative commitment to qualifying conditions:
a. The project is managed so that less than one (1) acre of land disturbance occurs on a daily;
b. The disturbed land where work has been completed is adequately stabilized on a daily basis;
c. The environment is protected from erosion and sedimentation damage associated with the land -
disturbing activity; and
d. The owner and/or construction activity operator designs, installs, implements, and maintains
pollution prevention measures. [The plan does this via design or narrative, sheets 9, 11, 12, 13,
but slight revisions requested. Ref. Sec. A comments, above.]
13. While it ACSA/RWSA design approval authority is unquestioned, County Engineering retains approval
authority relative to: steep slopes, buffers, VSMP (ESC, SWM, SWPPP), and floodplain management.
Engineering requires complete plan/profile design no less than design details submitted to ACSA/RWSA.
Provide new /upgraded sanitary sewer profiles (no profiles submitted) required to:
a. Evaluate depth vs. construction corridor minimum required width.
b. Confirm design (MH rim, vent) elevations relative to 100-yr base flood elevation.
c. Evaluate possible SSL crossing conflicts (streams; storm outfalls; other utilities; etc.).
d. Ensure minimum separation between sanitary sewer lines and storm lines, or water lines.
e. Evaluate alignment relative to maximum practical avoidance of protected stream buffer.
14. Provide Easement Table for proposed 12" and 8" sanitary sewer lines. Ref. ACDSM, pg. 15/image below:
EASEASEN4 WIDTH = DIAMETER + 2' + 1 IH-5' 1 + 10' (201 MI I.
EASEMENT WIDTH
10'-0"
EQUIPMENT
LANDING
1'-0" (TYP)
DLANIETER J 1
1'
4
'^ STOF
10 PIPE
15. Submit Floodplain Development Permit (FDP) Application; Ref. WP0201600015. Do not submit this 13-
sheet plan set with FDP Application, but provide cover letter reference to WP0201600015. Also, item #16
— link:
Engineering Review Comments
Page 3 of 5
http://www.albemarte.org/upload/images/forms_center/departments/Communi!y Development/forms/Engin
eering_and _WPO_Forms/Floodplain_Development _Permit.pdf
16. Provide PE -seal `No Rise' Certification with FDP Application: sample Attached.
17. Revise Plan title to read: Old Trail VSMP Plan for Slabtown Sanitary Sewer Expansion (WPO201600015)
18. Show existing sanitary sewer lines in Phase 2; sheets 6, 7, 8 (SSL are shown in Phase 1). Ex. SS MHs are
shown in Phase 2, but not SS lines. This helps support design of new /replacement lines relative to existing
lines, relative to stream buffers.
19. Label/show new or upgraded sanitary lines, plan view; for example: 8" SSL, or 12" SSL.
20. Recommend label sanitary pipe sections between SS MH. Recommend assign pipe numbers.
21. Sheet 9, Project description lists total disturbed area =6.1 Ac. Transfer this or revised disturbed area value
to plan view (show with disturbed area labels). Also, see item #22.
22. Typical corridor width shown =29'f. Reduce this to minimum necessary to limit stream buffer impacts.
Provide design rationale for any portion of utility corridor width >25' in wooded sections or > 20' in open
(non -wooded) sections. These widths should suffice. Design to these widths. Label typ. corridor widths.
Recalculate and report revised disturbed area, if <6.1 Ac. Stream buffer avoidance and impact
minimization are mandatory and minimum requirements.
23. Provide detail for watertight frame and cover for floodplain management review /approval purposes for
FEMA program audit. Albemarle County is under FEMA directive to implement program oversight
consistent with NFIP requirements.
Sheet 2
24. Revise scale.
25. If pipe sections or MH (Ex. SS) are to be removed (TBR) or abandoned, specify means of abandonment.
Comply with state law governing sanitary decommissioning. Address via project sequence.
26. Sheet 3 —USC abbreviation unclear; revise ESC legend.
C. VSMP: SWPPP: Erosion Control Plan (WPO201600015)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is
approved pending follow-up request for slight revisions at items #9, #21, #24. Please send sheet 4 .PDF prior to print
resubmittal.
Sheet 4
27. Avoid preserved slopes. Relocate CE on Golf Drive, shift E to coincide with median break, Golf Drive.
Proposed CE location cannot be approved (Avoidable impact to preserved slopes /GIS image, below).
Engineering Review Comments
Page 4of5
28. Orient (both) compass N arrows to correct orientation.
29. Revise Golf View Drive to read Golf Drive.
30. Sheet 5 —Shift CE on west side of Old Trail Drive 140' N; locate between contours 660' and 658'.
31. Sheet 7 —Define/include sanitary sewer utility work between MH C and G with sheet 9 project description.
Sheet 9
32. Include work, MH C-G, in project description. Also, see item #31.
33. Revise project description total disturbed area, yrevised < 6.1 Ac.
34. Sequence of construction Note 2 —Include Golf Drive.
35. Sequence of construction Note 13 —"Slopes steeper than 3:1 must be permanently stabilized with
landscaping vegetation hardier than grass which will not require mowing." ACDSM, 8.A.2. Stabilization
matting alone is insufficient.
36. Revise ESC Legend —include MU. Show straw mulch in plan view.
37. Copy ESC Legend to Title page, or an earlier plan sheet.
D. Mitigation Plan (WPO2016-00015) — NA, Ref. 17-602.13. L-3.
The mitigation plan content requirements can be found in County Code section 17-406.
Engineering review staff are available 2-4 PM on Thursdays if you wish to discuss project, comments, or design.
Plan review staff available at 434.296-5832 -0069, should you have any questions.
Process:
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate request
form and fee to the Department of Community Development. A plan reviewer will prepare ESCP estimate amount,
and check parcel and easement information based on the approved plans. The County's Management Analyst will
prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash,
certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County
Attorney and County Engineer. This may take 2-4 weeks to obtain all the correct signatures and forms.
Engineering Review Comments
Page 5 of 5
VAR100043 was modified by VDEQ, 16-Mar 2016. VAR100043 does not cover Slabtown Branch Sanitary Sewer
Extension, but ff VDEQ Guidance Memo 15-2003 is applied, this linear utility project may be exempted from state
CGP coverage requirements. Exemption is not by right or statute, but at local VSMP authority discretion. There is
no linear project guidance exemption from SWPPP requirements; these remain in effect. DEQ Guidance Memo 15-
2003 does not eliminate VPDES requirements, but grants local Authority ability to apply specific conditions to a
project in lieu of stormwater management facilities. This is the approach Albemarle County proposes to take with
this project. At Applicant request, SWM requirements (quality/quantity control) may apply, and Albemarle County
will accept and review SWM facility design, if submitted. If Applicant elects Guidance Memo 15-2003 review, then
VAR100043 requires no update, and no additional state fees apply. As reminder, Guidance Memo 15-2003 imposes
specific conditions. Ref. Sec. B comments, above, and Attached Memo Guidance (Melanie D. Davenport, Director,
DEQ/Water Division, 23-Apr 2015).
Once ESCP is approved, the Plan must be bonded —see above.
Once ESCP bond is posted (after review agency Approvals obtained, including resource permits —no utility stream
crossings proposed, however), Applicant may request and the County can hold a pre -construction conference.
Applicant will need to request a pre -construction conference by completing a form —all state fees have been paid.
The form identifies the contractor and responsible land disturber, and remaining fee to be paid (county portion).
This will be checked by county staff, and upon approval, a pre -construction conference will be scheduled with the
County inspector. At the pre -construction conference, should everything proceed satisfactorily, a Grading permit
will be issued so that work may begin.
County forms can be found on the county website forms center under engineering;
htW://www.albemarle.orgJdeptforms.asp?department--cdengnoo
Thank you
434.296-5832 —x3069
File: WP0201600015 OTV slabtown branch sewer extension 041516